608 airsoft ball bearing

thingiverse

I located the original creation on Thingiverse and used Tinkercad to modify it by adding a precise 5.5mm gap between the internal bearing and external wall, enabling you to add one 6mm ball bearing at a time. When adding the fourth ball bearing, I found that pressing them in became increasingly difficult, so I recommend using a vice or clamp to slowly press the bearings through the hole while maintaining control. To ensure smooth operation, I sanded both parts thoroughly. In Version 2 of this design, I made significant improvements by enlarging the access hole to 5.5mm, making it much easier to place the ball bearings.